<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .silde{
            width: 50px;
            background-color: #1b6d85;
            position: absolute;
            right: 0;
            top:0;
            bottom: 0;
        }
    </style>
</head>
<body>
<div class="silde"></div>
</body>
</html>